Mixing and compressing machine



July 4, 1933. HA w1 L E BoUTiLLlER Er A1. 1,917,040

MIXING AND COMPRESSING MACHINE Filed Jan.t 22, 1929 2 Sheets-Sheet 1 1IN VEN TOR #www l/L/f an r/z un? and IY ffa H555 f/T ToRNEYs. Z

July 4 1933- H. w. LE BOUTILLIER ET AL. 1,917,040

MIXING AND COMPRESSING MACHINE Filea Jan. 22. 1929 2 sheets-sheet 2Patented July 4, 1933 UNITED STATES PATENT OFFICE HENRY W. LEBOUTILLIER, 0l' DBEXEL HILL, AND FRED HEBB, 0F PHILADELPHIA,

PENNSYLVANIA, ABBIGNORB T0 THE SEI-:AB COKPANY, 0F PHILADELPHIA, PENN-SYLVANIA, A rOORPOBATION Ol' NEW YORK MIXING AND OOMRESSING IACHINEapplication ined January an. ma segna a. escasa.

The present invention relates to machines for mixing and compressing aplurality of gases in predetermined roportions and in particular ourmachine 1s especially appli-A cable for the mixin and compressing ofcombustble gas and air in ex losivc or nonex plosive proportions. The oject of our invention is to provide an improved construction .and modeof operation of a gas mixing and compressing machine characterized b amaterial reduction" in the number p pa weight and loor space occupied;improved provisions for cleaning, repairing, and replacing parts; simpleand effective means for` regulating and controlling the gas pro'ortions; low manufacturin cost, anda --'e' ac tion in the cost ofoperation. j

The various features of novelty which characterize our invention arepointed out with articularity in the claimsv annexed to and orming apart of this specification.

` For a better understanding of the invention,

however, and the advantages possessed by it reference should be had tothe accompan ing drawin and descri tive matter in whic we have iustrated an described a preferred embodiment of the invention.

0f the drawin Fig. 1 is an e evation of assembled;

Fig. 2 is a lhorizontal section on the line 2 2 of Fig. 1;

flig. 3 is a vertical section on the line 8-3 o 1 1 4 is a verticalsection on the line 4.--4

o ig. 1 I

Fig. 5 is a vertical section on the line 5-5 of Fig. 4- and Y Fig. 6 isa bottom view of the gas overnor.

In the drawings, a preferred em odiment of our improved mixin and comressing machine is illustrated which broad y comprises a gas governorunit A into which combustible gas at varying pressures is passed anddischarged at atmospheric pressure, a mixer unit B in which t e enteringgas is mixed with air in predetermined proportions irrespective of thedemand on 'the machine, a c eck valve for preventing back pressure onthe machine as the mixer, and a constant speed rotary comn pressor D inwhich the air and gas mixture 1s com )ressed and issues at a pressureautomatica ly maintained constant by a pressure governor E controlling aby-pass connection from the compressor outlet to the compressor inlet.When air and gas are being mixed in non-explosive roportions, themixture is delivered throng suitable conduits to a burner of the Bunsentype (not shown) in which the balance of the air required :for completecombustion is induced before themixture enters the combustion chamber.

y As shown most clearly in Figs. 2 4and 3, the machine includes a gasovernor unit A and a mixer unit B arrange in side b side relation in themachine body at one si e of a vertical partition D". The portion of thebody in which the gas governor unit is positioned, is divided into anenlarged up er, a restricted intermediate, and an enlarge lower chamberA', A and A, respectively, by a pair of vertically spaced horizontalpartitions A.. The intermediate chamber A' is limited in width bysubstantially vertical walls A" extending between t e horizontalartitions A and connected to the up er c amber Aby a tapered opening A"an to the lower chamber A by a tapered opening A slightly larger thanand in axial a gnment with the opening A". A gas su ply conduit yisconnected to the chamber at A' and a delivery passage A is formed in theopposite portion of the chamber. The supply and deliver passages areseparated bye ta red cage Gyitting 1n and projecting throug the o nins Aand A.

The cage is a 'ustably secured in position by a clamp nut threaded onthe upper end of the cage and resting on the upper partition A. The cageis" provided wit a cylindical partition G2 open at the side adj acent'the gas inlet and having u per and lower tapered valve seats G andrespectively, through which gas can pass to the delivery passage A. Atubular valve ,stem G*s having spaced valve discs G and G integraltherewith is positioned in the cage with the discs G'pand Gf' resting onand closing the ports Gin and G, respectively. A valve stern G iSdetachably connected to the lower end arallel of the valve stem G' by athreaded bolt G' extending through the valve stem Gr and threaded intothe upper end of the stem G". Upper and lower valve stem guide membersare mounted in vertically spaced portions of the cage. O

The amount of gas passin through the cage to the passage A 1s regu atedby pressure res onsive means responsive to the pressure di erentialexisting between the ressure of the gas lin the passa e A an thepressure of the atmos here. e pressure res onsive means re ably comprisea ilexi le diaphragm 1 secured to the valve stern G in the chamber A1.The circumferential portion of the Vdiaphragm is positioned betweenrings G11 secured to the enlarged bellshaped lower end of the cage. Acounterweight G11 is adjustable on a fork G1' having an intermediateportion pivoted on a support G and its other end extending throuh to aslot in the portion of the valve stein 1 below the diaphragm. A plug G1'normally closes an o ning in the machine body through whic the plositionof the weight can be adjusted manua y.

The position of the lweight G11 is adjusted until the weight of themovable valve parts is balanced and the valve is in a position ofequilibrium. When in o ration, the lower side of the diaphragm issubjected to the pressure of the atmosphere existing in the chamberwhich is open to a corresponding chamber in the mixer sectionhereinafter described. The upper diafphragm side is subjected to thepressure o the gas in the passage A by a small passage G1 openingthereto. A removable cap G1' closes the top of the chamber A and permitsaccess to the governor parts in that chamber. When the pressure of thegas in the passage A falls below atmospheric due to the suction created`by the compressor D, the diaphragm rises and opens the valve ports topermit gas to pass into the passage until the pressures on ,the oppositesides of the diaphragm are equal. As the pressurer differential on thediaphragiirwill increase with the demand,

- lthis arrangement permits maximum gas iiow with maximum demand. Theabove described provisions will thus maintain a supply of combustiblegas in the passage .Aa at .atmospheric pressure irres ctive ofvariations in the gas pressure in the inlet passage A'.

The mixer unit B, illustrated in Figs. 2 and 3, 'in which thecombustible gas and air is mixed in predetermined proportion is 1ocatedin an adjacent portion of the body which is divided into chambers B1, B1and B1 by the partitions A and proportioned and arranged similarly tothe corresponding chambers of the gas governor. A tapered mixer cage Hpasses through axially aligned of the sleeve. An internal flange v.themixer cap H1".

ytapered openings B yand B9 in the up r and lower partitions,respectively, and is eld in position at its upper end by a clamp nut H.An inlet B from atmosphere opens to one side of the chamber B". Theportion of the cage H in the chamber Bs is formed with rectangularopenings H1' and H1, connecting the mixer chamber within the cage withthe gas passage and air inlet, respectively. A sliding valve sleeve H1,closed at its lower end, is positioned within the cage H and arrangedfor vertical movements therein by means of a diaphra rod H's connectedto a diaphragm H1 hereinafter described. The rod H is detachablyVconnected to a vertical rod H", portions of the rods being spaced-apartto provide a swivel mountin for the sleeve H. Valve ports H1 and scorresponding in form and area to the cage openings H2 and H,respectively, are formed in opposite side ortions on the cage limits thedownward movement of the sleeve. The rod H"` is arran d in contact witha flexible diaphragm I, a reduced threaded extension of the rod passingthrough the center of the diaphragm. The diaphragm H1 is connected tothe bellshaped lower end of the cage H in the saine manner as the gasgovernor diaphragm arrangement previously described. A nut H11, threadedon the rod extension, holds the diaphragm and rod in engagement. The nutH11 and rod H*1 are so proportioned that the weight of these parts issuilicient to restore the sleeve H4 to its lowermost position, as shownin Fig. 3, when the compressor is stopped.

Vertical rods H12 guide the vertical movements of the valve sleeve H andprevent relative rotation thereof. The guide rods are rigidly connectedat their upper ends to a horizontal bar H11I which has a vertical stemH1* rotatably mounted in a central boss on The lower ends of the rodspass through llugs H16 on the inner side of the sleeve. A hand wheel H17having various air-gas ratio settings indicated thereon at spacedpoints, is secured to the upper end of the stem H14. A passage H1s inthe lower end of the sleeve provides communication between the mixerchamber and the upper side of the diaphragm H1. An opening H1 in thelower partition A1J ensures atmospheric pressure in the chambers B* andA. A removable plug H2 in the side of the body provides access to thechamber B. phragins of the gas governor and mixer units are preferablymade of leather positioned between a pair of metal discs.

With the mixer apparatus described, air and gas can be mixed in anypredetermined lll proportion by volume within the limits of in registerwith the openings H and H', res iectively. The air and gas ratio beingset, t ie total amount of air and gas entering the mixer chamber will beproportional to the demand of the compressor. When the compressorisstopped the parts assume by gravity the position shown in Fig. 3 and noair or gas can pasl into the mixer chamber. Then the compressor isoperating, the pressure in the mixer chamber is less than atmosphericand the diaphragm H1 is forced upwardly a iroportionate distance by thepressure di erential thereon and the ports and openings coincide topermit the air and gas t0 enter'in the predetermined volumetricproportions. The air and gas mixture passes out of the mixer chamberthrough the upper chamber B2 into a housing J leading to the inlet sideof the compressor.

The housing J is positioned horizontally on the side of the machine andis provided at its end adjacent the compressor with a check valve J 2.At that end the housing is formed with an angular valve seat J againstwhich the check valve seats. The valve J is pivoally mounted on ahorizontal pin on a valve lever J s, which is pivoted at its upper endto the housing. Lugs J on the rear side of the valve project beyond thelever and are connected at their ends by a pin J5 to limit the pivotalmovement of the valve relative to the lever.

When the compressor is operating and there is no demand for its output,the pressure building up in the compressor forces the check valve toseat and thereby prevents back pressure on the mixer diaphragm. Thecheck valve remains open during normal operation of the machine andpermits the gas and air mixture to pass to the compressor and closes byits own weight when the compressor stops.

The compressor portion of the machine comprises inlet and outletchambers D and D2, respectively formed inthe machine body and an outercup-shaped housing D3 enclosing a rotor chamber D. The verticalpartition D5 separates the inlet and outlet chambers from thc mixer andthe gas governor chambers, respectively and a horizontally spacedvertical partition Du separates the first mentioned chambers from therotor chamber. The housing D is separable from the remaining portion ofthe body and secured there-7o by a plurality of stud bolts. When thecompressor is operating the air and gas mixture is drawn through thecheck valve into the inlet chamber D', from which it passes through aplurality of irregularly shaped inlet ports D. Da and D9 in the paryttion D into the rotor chamber D.

In the rotor chamber D a cylindrical rotor M is mounted on a shaft N,which is rotatably mounted in the hub D11 of a curved partition Dm. Thelatter extends between the parallel partitions D and Du and separatesthe rotor inlet and outlet chambers from one another. The hub extendsbetween the chambers A and 13'-l of the gas governor and mixerrespectively, as shown in Figs. 2 and 3. The shaft N is rovided with aplurality of packing rings El and a bearing N at each end thereof and isconnected by a. suitable coupling to the drive shaft of a constant s eedelectric motor (not shown).

As s own in Fig. 4 the rotor M is formed with a lpluralit of inclinedslots M', each of whic exten s from a point adjacent the center to thecircumference of the rotor. In the construction shown, each slot is atan angle of substantially 12 with a radial line drawn to thecircumferential end of the slot and the circumferential end of each slotis angularly spaced about from the corresponding en of each adjacentslot. A blade or vane M2, preferably of bre, bronze or" other materialhaving goed wearin proporties is slidabl mounted in each sibt and formedwith an lnclined outer edge M, which contacts with the side andcircumferential walls ofthe rotorhousingD". The cylindrical housing Dais constructed and arran ed eccentrically to the. rotor M. The ports D'and D communicate with chambers formed in circumferential bulgedportions M* of the housing which open directly to the noter chamberthrough openings M". The inlet port D opens to the rotor chamberdirectly.

With the eccentric arrangement of the rotor and housing shown, theblades M are entirel within the periphery of the rotor when t ey reachthe highest point in the path of rotation. As the rotor moves from thispoint through an arc of 180, the distance between the circumferentialsurface of the rotor and the wall Da progressivel increases and theblades slide outwardly dliie to centrifugal force and remain in contactwith the housing wall. The air and gas mixture is sucked in during thisportion of the movemeut. The compressing begins as cach blade reachesthe end of the inlet opening D8. The distance between the rotor and walldecreases through the remaining portion of the rotor travel. Thecompressing action continues until the blades reach the mixture outletports 1)12 and I)la at the opposite side of the rotor chamber from theinlet orts. The port Dl2 communicates with t e rotor chamber through oneof the expanded portions M* and `an opening M therem and the port D*s inin the partition D opens directly to the rotor chamber. The mixtureissuing from the outlet ports enters the outlet chamber D, from which itpasses through the passage D to the burners.

The mixture passing out of the outlet chamber D2 is maintained at apredetermined constant pressure by a ressure governor mounted directlyabove t c inlet and outlet charnbers of the rotor. In the constructionshown the pressure governor comprises a cylindrical piston P positionedin an opening P in the top of the outlet chamber casing. The piston I isarranged for vertical movements to open l form a disc P norma y restingon a raised lli portion Q of a cap Q which is mounted on a bosssurrounding the opening P. Aligned passa ewalys P* and P" connect theoutlet chamer with the underside of a dia- .phragm Qz mounted in the capQ. A removable weight Qs is su ported on the diaphragm and iston disc ansecured in position by a stud lt Q. A casing Q is positioned on the capQ and formed with an atmospheric connection Q.

With the pressure governor construction described, the compressor outletpressure on the lower end of the piston and underside of the diaphragmis opposed tothe weight of the parts plus the atmospheric pressure onthe Weight and diaphragm. The size of the weight is proportioned inaccordance with the desired delivery pressure to be maintained so thatwhen the delivery pressure exceeds a predetermined amount, for examplethree and one-half pounds per s uare inch, the piston will be raised toopen t e by-pass connection to the inlet side of the compressor. Thepressu're on the delivery side of the com ressor is thus maintained at apredetermine value irrespective of the demand on the machine.

Means are provided for su plyin oil under pressure from a body of oil inthe ower part of the compressor outlet chamber to the in: ner side ofthe rotor housing D. The oil is subjected to the delivery pressure ofthe compressor which forces the oil through passages M' and MB into agroove M1 in the bottom of the rotor chamber. The amount of oil passingrto the rotor chamber is groverned by an adjustable needle valve M. heoil is supplied to the bottom of the outlet chamber through a fillingplug M11 in the bod The rotor housing is formed wit an extension R whichsurrounds the packin rings N and shaft bearin N. The extension has aplurality of heat issipating flanges R on its outer surface. A cap Rcloses the outer end of the extension. The opposite end of the machineis similarl provided with an extension Rs and a cap having a centralopenin through which the shaft N passes.

he machine is mounted on a base S and connected thereto by stud bolts S'passing through anged portions formed on the body of the machine.

When repairs or replacements are necessary to the gas governor or mixer,the stud bolts connecting the base and machine are removed and themachine tilted to permit the removal and replacement of the gas governoror mixer units. In this operation the top cap is removed and thecorresponding clampin nut disconnected to rmit the removal o the unitfrom the mac ine. A new unit may then be inserted'and secured in place.No diiliculty is found in removing or inserting the units due to thetapered form of the cages and partition openings. The unitaryconstruction also permits the assembling and testing of the governorandmixer elements before insertion in the machine. The position of thecounterweight in the gas governor unit can be adjusted without stoppingthe machine.

All of the parts are quite simple in construction and can bemanufactured at a relatively low cost. The machineis unusually compactand r uires a small amount of floor s ace. The inclined arrangement ofthe rotor b ades increases the effectiveness of the compressor byreducing the friction therein.

he capacity of the rotor can be increased by inserting a rotor unit ofgreater width, involving only the removal of the housing and rotor unit.The rotor parts can be inspected and cleaned without taking down therotor.

While in accordance with the provisions of the statutes, we haveillustrated and described the best form of embodiment of our inventionnow known to us, it will be apparent to those skilled in the art thatchanges may be made in the form of the apparatus disclosed withoutdeparting from the spirit of our'invention as set forth in the appendedclaims and that in some cases certain features of our invention may beused to advantage without a corresponding use of other features. Ourinvention is adapted for the mixing and compressing of gases other thanair and combustible gas, for example, acetylene and gas or oxygen andmay be operated on with little, if any, c ange 1n the presentconstruction and arrangement.

Having now described our invention what we claim as new and desire tosecure by Letters Patent, is:

1. Apparatus for mixing a plurality of gases in a predeterminedvolumetric ratio and at the same pressure and compressing the same whichcomprises a gas supply conduit in which the gas pressure is variable andnormally above a predetermined pressure, means for admitting gas fromsaid conduit and reducing its pressure to said predetermined pressure, asecond gas supply conduit containing another gas at said predeterminedpressure, means or mixing said gases in a predetermined volumetric ratioand at said predetermined ressure, a compressor unit arranged to receivesaid from said mixing means, means associated with ysaid gas mixin meansfor regulating the amounts of gas a itted to the atter directly inaccord- IUS ance with the demand on said coin ressor unit, and means formaintaining sai volumetric ratio constant irrespective of variations indemand.

2. Apparatus for mixing air and as in a predetermined volumetric ratioan at atmospheric pressure and compressing the same which comprises agas supply conduit in which the gas pressure is variable and normallyabove atmospheric pressure, means for admitting gas from said conduitand reducing its pressure to atmospheric pressure, an air supply conduitconnected to atmosphere, means for mixing said air and gas in apredetermined volumetric ratio and at atmospheric pressure, a compressorunit arranged to receive the air-gas mixture from said mixing means,means associated with said mixing means for re ulating the amounts ofair and gas admitted to the latter directly in accordance with thedemand on said compressor unit, and means for maintaining saidvolumetric ratio constant irrespective of variations Ain demand.

3. Apparatus for mixing a plurality of gases in a predeterminedvolumetric ratio and compressing the same which comprises means foradmitting a gas at a pressure coi'- responding to the pressure of asecond s an means for mixing said gases in a pretermined volumetricratio, said means being arranged side by side and having a conduitconnection therebetween, land a compressor unit arranged at one side ofsaid gas admission means and said mixin means and receiving said gasesfrom sai mixing means, said com ressor unit having a rotor shaftextending tween said gas admission means and said mixing means.

4. Apparatus for mixing a plurality of gases in a predeterminedvolumetric ratio and compressing the same which comprises a casinghaving means for admitting a gas at a pressure corresponding to thepressure of a second gas and means for mixing said gases in apredetermined volumetric ratio, said means being arranged side by sidein said casing and having a conduit connection therebetween, and acompressor unit arranged in said casin at one side of said gas admissionmeans an said mixing means and receiving said gases from said mixingmeans, said compressor unit having a rotor shaft extending through saidcasing between said gas admission means and said mixing means.

5. Apparatus for mixing a plurality of gases in a predeterminedvolumetric ratio and compressing the same which comprises a casinghaving a gas governor unit for admittin a gas at a predeterminedressiire, a secon gas supply connection, an a mixing .unit for mixingsaid gases in a predetermined volumetric ratio, said units beingarrangedside by side in said casing and having a conduit connectiontherebetween, and a compresser unit arranged in said casing at one sideof said gas governor and mixing units and receiving said gases from saidmixing unit, said compressor unit having an inlet chamber ad'acent saidmixing unit, an outlet chamber a jacent said as governor unit, and arotor shaft mounted in said casing and arranged to extend between saidgas governor and mixing units.

6. In gas mixing apparatus the combination of a casing having a gaspassage therein, agas governor unit comprising a cage positioned in andclosin said passage, a valve controlled port in said ca e, and pressureresponsive means below sai passage arranged to control the as flowthrough said port in accordance wit the demand on said apparatus, saidunit being detachably secured in, and bodily removable from said casing.

n 7. n gas mixing apparatus the combination of a casing having a gaspassage formed therein axially aligned tapered openings in said casingat opposite sides of said passa e, a gas governor unit adapted tocontrol t e passage of gas through said passage comprising a taperedcage positioned in said openings, a valve port in said cage, a valvecontrolling said port, and pressure responsive valve operating meanspositioned in the lower end of said cage.

8. In gas mixing apparatus the combination of a casing havin a gas passaformed therein, and axially aligned tapere openings in said casing atopposite sides of said passage, a gas governor unit ada ted to controlthe passage of gas through sai passa e comprising a tapered cagepositioned in said openings, a valve port in said cage, a valve controling said port, a diaphragm positioned in the lower end of said cage andsubjected to atmospheric pressure on its lower side, a l

assage connecting the u per side of said iaphragm to the outlet si e ofsaid c e, and means connecting said valve and diap ragni.

9. In gas mixing apparatus the combination of a casing havingr a gaspassage formed therein land axially aligned tapered openings in saidcasing at opposite sides of said passage, a gas governor unit adapted tocontrol the passage of gas through said passa e comprising a taperedcage positioned in said openings, a valve port in said cage, a valvecontrolling said port, a diaphragm positioned in the lower end of saidcage, a passage connecting the upper side of said diaphragm to theoutlet side of said cage, and means connecting said valve and diaphraand means releasably securing said unit in position in said body.

10. In gas mixing apparatus the' combination of a casing having anopening in its lower end, a mixing unit for mixing a plurality of gasesin definite proportions and a gas governor unit for regulating theadmission of one of said gases to said mixin unit and means forsuspending said units 1n sai casing above said opening therein, each ofsaid units being bodily removable through said opening.

11. Gas mixin apparatus having a pair of gas inlet openings at spacedpoints therein, a passage connecting said openings, means for mixingsaid gases in definite proportions positioned in said passage andarranged to receive gases from said inlets at a predetermined pressure,a gas governor unit arranged in said passage between said mixing meansand one of said inlets and having a valve port therein, a valve foropening and closing said port, a differential pressure diaphragm belowsaid valve, and a valve stem detachably connected to said diaphragm.

12. Gas mixing apparatus having a pair of gas inlet openings at spacedpoints therein, a passage connecting said openings, means for mixin saidgases in definite proportions positione in sald passage and arranged toreceive gases from said inlets at a predetermined pressure, a gasgovernor unit arranged in said passage between said mixing means and oneof said inlets, said mixing means and said gas governor unit eachincludin a cage member and means for controlling t e as Howtherethrough, each of said means being actuated by a differentialpressure diaphragm, and means for removably mounting each of saiddiaphragms in position on the corresponding cage member.

13. Gas mixing apparatus comprising in combination, a casing having apassage therein, a gas mixing unit removably mounted in said casing andpositioned in said passage and comprising means for mixing a pluralityof gases in definite proportions, and an opening formed in the lowerportion of said casing for the bodily insertion and removal of saidmixing unit,

14. Gas mixing apparatus comprising a casing having a mixing unit formixing a plurality of gases in definite proportions, means for supplyinga plurality of gases to said mixing unit, said mixing unit comprising avalve cage having gas ports in the sides thereof, a sleeve rotatable insaid cage and having gas ports in the sides thereof adapted to registerwith said cage ports, said sleeve having a mixture outlet in its u perend, pressure responsive means mounte on the lower end of said cage andoperatively connected to said sleeve, means for rotatin said cage tovary the mixing ratio, an means restricting the sleeve to verticalmovements only for each position of said last mentioned means.

15. Gas mixing apparatus comprising a casing having a mixing unit formixing a plurality of gases in definite proportions removably mountedtherein, means for supplying a plurality of gases to said mixing unit,said mixing unit comprising a valve' cage having gas ports in the sidesthereof a clamp nut securing the upper end of sai cage to said casing, asleeve rotatable in said cage and having gas ports in the sides thereofadapted to register with said cage ports, said sleeve having a mixtureoutlet in its upper end a differential pressure diaphragm mounted on thelower end of said cage and connected to said sleeve, means for rotatinsaid cage to vary the mixing. ratio, an means or restricting the sleeveto vertical movements only for each position of said last mentionedmeans.

16. In gas mixing apparatus, the combination with a casing havmg a gasassage therein, of a gas governor unit detac ably secured in, and bodilyremovable from said casing and com rising a cage positioned in andclosing sai passage a valve mounted in said cage and controlling gas owthrough said passage and operating means for said valve mounted on saidcage and comprising a differential pressure responsive member andadjustable means regulating the action of said member.

17. In gas mixing apparatus, the combination with a casing having a gaspassa e therein, of a gas governor unit and a mixm unit each detachablysecured in, and bodi y removable from said casing and each comprising acage positioned in and closing said passage the two cases beingpositioned in separated portions of said passage, a valve mounted ineach cage, the valve in said governor unit controlling gas iow into, andthe valve in said mixer unit controlling gas flow out of said assage,and individual operating means or each valve mounted on thecorresponding cage and comprising a pressure responsive mem r.

18. An apparatus of the class described, comprising a casing havingfirst and second inlet ports, a sleeve valve movably mounted in saidcasing and having orts coo eratin with said first and secondJ ports, rstan second gas-tight chambers, a movable partition separating saidchambers, an outlet port for the casing communicating with the valveports and with the first gas-tight chamber, means operatively connectingthe movable partition and valve for causing movement of the partition toimpart longitudinal movement to the valve, means for turning the valveto ircumferentially ad'ust the valve ports relatively to said first ansecond ports, the means for rotaing the valve including slidablyconnected pin members and socket members, said last mentioned meanspreventing rotation of the valve durin longitudinal movement of thelatter an means for movin certain of said members about the axis o saidvalve.

19. An apparatus of the class described, comprising gas-tightcompartments, a movable partition se aratin one compartment from theother, rst an second inlet ports opening into one of said compartments,a tubular piston valve having ports cooperat` ing with said first andsecond inlet ports, an outlet port communicatin with the valve portsthrough one end o? said piston and also with the last mentionedcompartment, means operatively connecting the valve to said movablepartition, means for rotatin said valve for varying the registration oits ports with said first and second ports, and means placing the otherone of said compartments in communication with the upstream side of oneof the inlet ports.

20. An apparatus of the class described comprising a casing having firstand second inlet ports, a sleeve valve movably mounted in the casing andhaving ports cooperating with said inlet ports, first and secondgastight chambers, a movable partition separating said chambers, anoutlet port for the casing communicating with the valve orts through oneend of said sleeve valve an also with the first gas-tight chamber, meansoperatively connecting the movable partition and valve for causingmovement of the partition to impart longitudinal movement to the valve,manually controlled means for turning the valve to circumferentialladjust the valve ports relatively to the in et ports, and means placingthe second gas-tight chamber in communication with the upstream side ofone of the inlet ports.

Signed at Philadelphia, in the county of Philadelphia and State ofPennsylvania this 18th day of January, A. D. 1929.

HENRY W. LE BOUTILLIER. FRED HESS.

CERTIFICATE 0E CORRECTION.

Para No. 1,917,040.

July 4, 1933.

HENRY W. Le BOUTILLIER, ET AL.

lt is hereby certified that the State of Incorporation of the assigneeinthe4 above numbered patent was erroneously described and speciiied as"New York" whereas it should have been described and specified as"Pennsylvania", as shown bythe records of assignments in this office;should be read with this correction therein that the same may conformrecord of the easel in the Patent Office.

and that the said Letters Patent vto the Signed and sealed this 29th dayof August, A.l D. 1933.

(Seal) M. J. Moore. Acting` Commissioner of Patente.

able partition se aratin one compartment from the other, rst an secondinlet ports opening into one of said compartments, a tubular pistonvalve having ports cooperat` ing with said first and second inlet ports,an outlet port communicatin with the valve ports through one end o? saidpiston and also with the last mentioned compartment, means operativelyconnecting the valve to said movable partition, means for rotatin saidvalve for varying the registration o its ports with said first andsecond ports, and means placing the other one of said compartments incommunication with the upstream side of one of the inlet ports.

20. An apparatus of the class described comprising a casing having firstand second inlet ports, a sleeve valve movably mounted in the casing andhaving ports cooperating with said inlet ports, first and secondgastight chambers, a movable partition separating said chambers, anoutlet port for the casing communicating with the valve orts through oneend of said sleeve valve an also with the first gas-tight chamber, meansoperatively connecting the movable partition and valve for causingmovement of the partition to impart longitudinal movement to the valve,manually controlled means for turning the valve to circumferentialladjust the valve ports relatively to the in et ports, and means placingthe second gas-tight chamber in communication with the upstream side ofone of the inlet ports.

Signed at Philadelphia, in the county of Philadelphia and State ofPennsylvania this 18th day of January, A. D. 1929.

HENRY W. LE BOUTILLIER. FRED HESS.

CERTIFICATE 0E CORRECTION.

Para No. 1,917,040.

July 4, 1933.

HENRY W. Le BOUTILLIER, ET AL.

lt is hereby certified that the State of Incorporation of the assigneeinthe4 above numbered patent was erroneously described and speciiied as"New York" whereas it should have been described and specified as"Pennsylvania", as shown bythe records of assignments in this office;should be read with this correction therein that the same may conformrecord of the easel in the Patent Office.

and that the said Letters Patent vto the Signed and sealed this 29th dayof August, A.l D. 1933.

(Seal) M. J. Moore. Acting` Commissioner of Patente.

